With advancements in cloud video services and public internet stability, business video calling now offers additional benefits, such as improved quality and reliability.
When video conferencing was first introduced as a serious business tool, it was almost strictly on premises. Calls were hosted on an appliance called a multipoint control unit, or video bridge, which sat on your local network and had limited access to the public internet. This restricted video calls to within an organization. Business-to-business video conferencing was possible, but not easy.
These limitations were primarily due to the technology at the time of video conference systems. Video conferencing signals and protocols were not as resilient as they are today. A slight bit of packet loss could severely affect a call. Even just 3% to 5% packet loss could cause a video conference to drop entirely.